How much amount of N a C l should be added to 600   g of water ρ = 1.00 g / m L to decrease the…

$∆T_f=0.2°C$
$∆T_f=$ $i{k}_{f}m$
$0.2=2\times 2\times \frac{\omega }{58.5}\times \frac{1000}{600}$
$\omega =\frac{0.2\times 58.5\times 600}{1000\times 4}=\frac{1.2\times 58.5}{40}=\mathrm{01.76 }g$

Freezing point depression is the phenomena that describes why adding a solute to a solvent results in the lowering of the freezing point of the solvent.